dh_installxmlcatalogs: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/dh_installxmlcatalogs - from package: xml-core

You may install the required package with command apt-get install {package}

Error in other languages:
dh_installxmlcatalogs: bevel nie gevind nie
dh_installxmlcatalogs: comandă negăsită
dh_installxmlcatalogs: comando não encontrado
dh_installxmlcatalogs: commande introuvable
dh_installxmlcatalogs: command not found
dh_installxmlcatalogs: käsku ei ole
dh_installxmlcatalogs: không tìm thấy lệnh
dh_installxmlcatalogs: komanda nerasta
dh_installxmlcatalogs: Kommando nicht gefunden.
dh_installxmlcatalogs: kommandot finns inte
dh_installxmlcatalogs: komut yok
dh_installxmlcatalogs: nie znaleziono polecenia
dh_installxmlcatalogs: níor aimsíodh an t-ordú
dh_installxmlcatalogs: no se encontró la orden
dh_installxmlcatalogs: no s'ha trobat l'ordre
dh_installxmlcatalogs: opdracht niet gevonden
dh_installxmlcatalogs: parancs nem található
dh_installxmlcatalogs: perintah tidak ditemukan
dh_installxmlcatalogs: príkaz nenájdený
dh_installxmlcatalogs: příkaz nenalezen
dh_installxmlcatalogs: команда не найдена
dh_installxmlcatalogs: командата не е открита
dh_installxmlcatalogs: 命令找不到
dh_installxmlcatalogs: コマンドが見つかりません